http://www.adslguide.org.uk/newsarchive.asp?item=2194
Looks like Ukonline are now doing 512k for £9.99 and 2mbit for £19.99, and did I mention they're uncapped? :p
Whoever said the future was metered broadband?
Only downside is that it's currently only on LLU exchanges, but one hell of a step in the right direction.